forked from google/gson
/
ToNumberPolicyTest.java
139 lines (128 loc) · 5.33 KB
/
ToNumberPolicyTest.java
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/*
* Copyright (C) 2021 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.gson;
import java.io.IOException;
import java.io.StringReader;
import java.math.BigDecimal;
import com.google.gson.internal.LazilyParsedNumber;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.MalformedJsonException;
import junit.framework.TestCase;
public class ToNumberPolicyTest extends TestCase {
public void testDouble() throws IOException {
ToNumberStrategy strategy = ToNumberPolicy.DOUBLE;
assertEquals(10.1, strategy.readNumber(fromString("10.1")));
assertEquals(3.141592653589793D, strategy.readNumber(fromString("3.141592653589793238462643383279")));
try {
strategy.readNumber(fromString("1e400"));
fail();
} catch (MalformedJsonException expected) {
assertEquals("JSON forbids NaN and infinities: Infinity at line 1 column 6 path $", expected.getMessage());
}
try {
strategy.readNumber(fromString("\"not-a-number\""));
fail();
} catch (NumberFormatException expected) {
}
}
public void testLazilyParsedNumber() throws IOException {
ToNumberStrategy strategy = ToNumberPolicy.LAZILY_PARSED_NUMBER;
assertEquals(new LazilyParsedNumber("10.1"), strategy.readNumber(fromString("10.1")));
assertEquals(new LazilyParsedNumber("3.141592653589793238462643383279"), strategy.readNumber(fromString("3.141592653589793238462643383279")));
assertEquals(new LazilyParsedNumber("1e400"), strategy.readNumber(fromString("1e400")));
}
public void testLongOrDouble() throws IOException {
ToNumberStrategy strategy = ToNumberPolicy.LONG_OR_DOUBLE;
assertEquals(10L, strategy.readNumber(fromString("10")));
assertEquals(10.1, strategy.readNumber(fromString("10.1")));
assertEquals(3.141592653589793D, strategy.readNumber(fromString("3.141592653589793238462643383279")));
try {
strategy.readNumber(fromString("1e400"));
fail();
} catch (MalformedJsonException expected) {
assertEquals("JSON forbids NaN and infinities: Infinity; at path $", expected.getMessage());
}
try {
strategy.readNumber(fromString("\"not-a-number\""));
fail();
} catch (JsonParseException expected) {
assertEquals("Cannot parse not-a-number; at path $", expected.getMessage());
}
assertEquals(Double.NaN, strategy.readNumber(fromStringLenient("NaN")));
assertEquals(Double.POSITIVE_INFINITY, strategy.readNumber(fromStringLenient("Infinity")));
assertEquals(Double.NEGATIVE_INFINITY, strategy.readNumber(fromStringLenient("-Infinity")));
try {
strategy.readNumber(fromString("NaN"));
fail();
} catch (MalformedJsonException expected) {
assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $", expected.getMessage());
}
try {
strategy.readNumber(fromString("Infinity"));
fail();
} catch (MalformedJsonException expected) {
assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $", expected.getMessage());
}
try {
strategy.readNumber(fromString("-Infinity"));
fail();
} catch (MalformedJsonException expected) {
assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $", expected.getMessage());
}
}
public void testBigDecimal() throws IOException {
ToNumberStrategy strategy = ToNumberPolicy.BIG_DECIMAL;
assertEquals(new BigDecimal("10.1"), strategy.readNumber(fromString("10.1")));
assertEquals(new BigDecimal("3.141592653589793238462643383279"), strategy.readNumber(fromString("3.141592653589793238462643383279")));
assertEquals(new BigDecimal("1e400"), strategy.readNumber(fromString("1e400")));
try {
strategy.readNumber(fromString("\"not-a-number\""));
fail();
} catch (JsonParseException expected) {
assertEquals("Cannot parse not-a-number; at path $", expected.getMessage());
}
}
public void testNullsAreNeverExpected() throws IOException {
try {
ToNumberPolicy.DOUBLE.readNumber(fromString("null"));
fail();
} catch (IllegalStateException expected) {
}
try {
ToNumberPolicy.LAZILY_PARSED_NUMBER.readNumber(fromString("null"));
fail();
} catch (IllegalStateException expected) {
}
try {
ToNumberPolicy.LONG_OR_DOUBLE.readNumber(fromString("null"));
fail();
} catch (IllegalStateException expected) {
}
try {
ToNumberPolicy.BIG_DECIMAL.readNumber(fromString("null"));
fail();
} catch (IllegalStateException expected) {
}
}
private static JsonReader fromString(String json) {
return new JsonReader(new StringReader(json));
}
private static JsonReader fromStringLenient(String json) {
JsonReader jsonReader = fromString(json);
jsonReader.setLenient(true);
return jsonReader;
}
}